“…The application of operant conditioning to this behavior was the first applied behavior analysis in autism (see Wolf, Risley, & Mees, 1964; see also Wolf, Risley, Johnston, Harris, & Allen, 1967). 2 Wolf also conducted research with the Institute's nursery school teachers on children's classroom problem behavior and the role of teacher attention in shaping and maintaining it (e.g., Harris, Johnston, Kelly, & Wolf, 1964). At the CDC, Robert C. Wahler analyzed how parents contributed to their children's asocial behavior and showed that mothers could serve as their therapists (Wahler, Winkel, Peterson, & Morrison, 1965), and Robert P. Hawkins independently conducted research on home-based parent training (Hawkins, Peterson, Schweid, & Bijou, 1966).…”